Cowboys & Aliens(2011) [Ella]: Killed in an explosion when she sacrifices herself by detonating the wrist-unit and blowing up the aliens' spacecraft. (She had also appeared to die earlier when an alien slashes her with its claws, but she later revives due to her own alien physiology.) (Thanks to Tommy)

In Time(2011) [Rachel Salas]: Dies when her allotted time runs out, as she runs into the arms of her son (Justin Timberlake). (Thanks to Tommy)